nav ul li:nth-child(2) a{
  color: #c5842d;
  border-bottom: 2px solid #fff;
}
/* banner-top */
.banner-top {
  width: 100%;
  height: 18.6rem;
  background-color: #000;
  position: relative;
}
.banner-top .nav-content {
  position:absolute;
	top:1em;
	left:6.35em;
	width:46.6rem;
	text-align:left;
}
.banner-top .nav-content .one{
	font-family:'黑体';
	font-size:0.4rem;
	color:#b1b1b1;
	line-height:1.35rem;
  margin-top:0rem;
  width: 13.45rem;
}
.banner-top .nav-content2 {
  position: absolute;
  top: 5.52rem;
  left: 27%;
  width: 31.25rem;
  text-align: center;
}
.banner-top .nav-content2 .two {
  font-family: '黑体';
  font-size: 2.5rem;
  line-height: 2rem;
  margin-top: 0rem;
}
.banner-top .nav-content2 .two a{
  color: #fff;
}
.banner-top .nav-content2 .two a::after {
  content: '';
  width: 1.45rem;
  display: block;
  margin: 0 auto;
  border-bottom: 1px solid #c5842d;
  padding-bottom: 2.25rem;
  }
.banner-top .nav-content2 .three {
  font-family: '黑体';
  font-size: 0.75rem;
  color: #878787;
  line-height: 1.45rem;
  margin-top: 1.55rem;
}
/* bannner------------------------------------------------- */
.banner {
  width: 100%;
  height: 32rem;
  background-color: black;
  position: relative;
}
.banner::after{
  content: '';
  width: 56.45rem;
  display: block;
  position: absolute;
  left: 6.35rem;
  border-bottom: 1px solid #363a3a;
}
.banner .img{
  width: 100%;
  height: 99.8%;
  display: block;
}
.banner .banner-content {
  position: absolute;
  top: 1rem;
  left: 6.35rem;
  width: 17.65rem;
  text-align: left;
}
.banner .banner-content .one{
  font-family: '黑体';
  font-size: 2.4rem;
  line-height: 2.25rem;
  margin-top: 10.25rem;
}
.banner .banner-content .one a{
  color: #fff;
}
.banner .banner-content .two {
  font-family: '黑体';
  font-size: 1rem;
  color: #878787;
  line-height: 1.45rem;
  margin-top: 2.25rem;
}
.banner .banner-content .three {
  width: 1.45rem;
	height: 1.45rem;
	line-height: 1.35rem;
	text-align: center;
	color: #fff;
	font-size: 0.85rem;
	float: left;;
  border: 1px solid #c5842d;
  border-radius: 50%;
	margin-top: 2.3rem;
}
.banner .banner-content .four {
  font-family: '黑体';
  font-size: 0.45rem;
  color: #878787;
  line-height: 1.45rem;
  margin-top: 10.25rem;
}
.banner .banner-content .four span{
  color: #c5842d;
}

/* banner-center------------------------------------------- */
.banner-center {
  width: 100%;
  height: 32rem;
  background-color: black;
  position: relative;
}
.banner-center::after{
  content: '';
  width: 56.45rem;
  display: block;
  position: absolute;
  left: 6.35rem;
  border-bottom: 1px solid #363a3a;
}
.banner-center .img{
  width: 100%;
  height: 99.8%;
  display: block;
}
.banner-center .banner-content {
  position: absolute;
  top: -1.25rem;
  right: 3.35rem;
  width: 19.65rem;
  text-align: left;
}
.banner-center .banner-content .one{
  font-family: '黑体';
  font-size: 2.4rem;
  line-height: 2.25rem;
  margin-top: 10.25rem;
}
.banner-center .banner-content .one a{
  color: #fff;
}
.banner-center .banner-content .two {
  font-family: '黑体';
  font-size: 1.15rem;
  color: #878787;
  line-height: 1.45rem;
  margin-top: 2.25rem;
}
.banner-center .banner-content .three {
  width: 1.45rem;
	height: 1.45rem;
	line-height: 1.35rem;
	text-align: center;
	color: #fff;
	font-size: 0.85rem;
	float: left;;
  border: 1px solid #c5842d;
  border-radius: 50%;
	margin-top: 2.3rem;
}
.banner-center .banner-content .four {
  font-family: '黑体';
  font-size: 0.45rem;
  color: #878787;
  line-height: 1.45rem;
  margin-top: 10.25rem;
}
.banner-center .banner-content .four span{
  color: #c5842d;
}

/* banner-bottom-------------------------------------------- */
.banner-bottom {
  width: 100%;
  padding-top:1.55rem;
	padding-bottom:2rem;
}
.banner-bottom .banner3_content {
  text-align: center;
  margin: 2.25rem 3.25rem 0.25rem 3.25rem;
}
.banner-bottom .banner3_content img{
  width: 90%;
  margin-bottom: -4.45rem;
}

.banner-bottom .banner3_content ul li .bb-text{
	position: relative;
	top:-3.75rem;
  left:7.75rem;
  width: 18.25rem;
	text-align:left;
}
.banner-bottom .banner3_content ul li .bb-text p{
	font-size:1.4rem;
	color:#fff;
	line-height:1.6em;
}
.banner-bottom .banner3_content ul li .bb-text a{
	display:block;
	width:8.35rem;
	height:1.9rem;
	text-align:left;
	line-height:1.9rem;
	color:#c5842d;
	font-size:0.85rem;
	margin:0.75rem 0 0 0;
}

.banner-bottom .return-top {
  text-align: center;
}
.banner-bottom .return-top button {
  width: 3.75rem;
  height: 1.45rem;
  background-color: #9c9c9c;
  margin-bottom: 1.25rem;
  position: relative;
  top: 1.25rem;
}
.banner-bottom .return-top button a{
  color: #fff;
  font-size: 0.15rem;
}
.clear {
  width: 100%;
  padding-top: 1px;
}